Vibrational Properties of a Two-Dimensional Silica Kagome Lattice

Torbjörn Björkman; Viera Skakalova; Simon Kurasch; Ute Kaiser; Jannik C. Meyer; Jurgen H. Smet; Arkady V. Krasheninnikov

doi:10.1021/acsnano.6b05577

Vibrational Properties of a Two-Dimensional Silica Kagome Lattice

Torbjörn Björkman^*, Viera Skakalova, Simon Kurasch, Ute Kaiser, Jannik C. Meyer, Jurgen H. Smet, Arkady V. Krasheninnikov

^*Corresponding author for this work

Department of Applied Physics

Research output: Contribution to journal › Article › Scientific › peer-review

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Abstract

Kagome lattices are structures possessing fascinating magnetic and vibrational properties, but in spite of a large body of theoretical work, experimental realizations and investigations of their dynamics are scarce. Using a combination of Raman spectroscopy and density functional theory calculations, we study the vibrational properties of two-dimensional silica (2D-SiO₂), which has a kagome lattice structure. We identify the signatures of crystalline and amorphous 2D-SiO₂ structures in Raman spectra and show that, at finite temperatures, the stability of 2D-SiO₂ lattice is strongly influenced by phonon-phonon interaction. Our results not only provide insights into the vibrational properties of 2D-SiO₂ and kagome lattices in general but also suggest a quick nondestructive method to detect 2D-SiO₂.

Original language	English
Pages (from-to)	10929-10935
Number of pages	7
Journal	ACS Nano
Volume	10
Issue number	12
DOIs	https://doi.org/10.1021/acsnano.6b05577
Publication status	Published - 27 Dec 2016
MoE publication type	A1 Journal article-refereed

Keywords

2D materials
2D silicon dioxide
anharmonicity
density functional theory
kagome
Raman spectroscopy

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acsnano.6b05577Final published version, 7.7 MBLicence: CC BY

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title = "Vibrational Properties of a Two-Dimensional Silica Kagome Lattice",

abstract = "Kagome lattices are structures possessing fascinating magnetic and vibrational properties, but in spite of a large body of theoretical work, experimental realizations and investigations of their dynamics are scarce. Using a combination of Raman spectroscopy and density functional theory calculations, we study the vibrational properties of two-dimensional silica (2D-SiO2), which has a kagome lattice structure. We identify the signatures of crystalline and amorphous 2D-SiO2 structures in Raman spectra and show that, at finite temperatures, the stability of 2D-SiO2 lattice is strongly influenced by phonon-phonon interaction. Our results not only provide insights into the vibrational properties of 2D-SiO2 and kagome lattices in general but also suggest a quick nondestructive method to detect 2D-SiO2.",

keywords = "2D materials, 2D silicon dioxide, anharmonicity, density functional theory, kagome, Raman spectroscopy",

author = "Torbj{\"o}rn Bj{\"o}rkman and Viera Skakalova and Simon Kurasch and Ute Kaiser and Meyer, {Jannik C.} and Smet, {Jurgen H.} and Krasheninnikov, {Arkady V.}",

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AU - Björkman, Torbjörn

AU - Skakalova, Viera

AU - Kurasch, Simon

AU - Kaiser, Ute

AU - Meyer, Jannik C.

AU - Smet, Jurgen H.

AU - Krasheninnikov, Arkady V.

PY - 2016/12/27

Y1 - 2016/12/27

N2 - Kagome lattices are structures possessing fascinating magnetic and vibrational properties, but in spite of a large body of theoretical work, experimental realizations and investigations of their dynamics are scarce. Using a combination of Raman spectroscopy and density functional theory calculations, we study the vibrational properties of two-dimensional silica (2D-SiO2), which has a kagome lattice structure. We identify the signatures of crystalline and amorphous 2D-SiO2 structures in Raman spectra and show that, at finite temperatures, the stability of 2D-SiO2 lattice is strongly influenced by phonon-phonon interaction. Our results not only provide insights into the vibrational properties of 2D-SiO2 and kagome lattices in general but also suggest a quick nondestructive method to detect 2D-SiO2.

AB - Kagome lattices are structures possessing fascinating magnetic and vibrational properties, but in spite of a large body of theoretical work, experimental realizations and investigations of their dynamics are scarce. Using a combination of Raman spectroscopy and density functional theory calculations, we study the vibrational properties of two-dimensional silica (2D-SiO2), which has a kagome lattice structure. We identify the signatures of crystalline and amorphous 2D-SiO2 structures in Raman spectra and show that, at finite temperatures, the stability of 2D-SiO2 lattice is strongly influenced by phonon-phonon interaction. Our results not only provide insights into the vibrational properties of 2D-SiO2 and kagome lattices in general but also suggest a quick nondestructive method to detect 2D-SiO2.

KW - 2D materials

KW - 2D silicon dioxide

KW - anharmonicity

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KW - kagome

KW - Raman spectroscopy

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Vibrational Properties of a Two-Dimensional Silica Kagome Lattice

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Keywords

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